炭水化物高濃度添加培地で培養したアスパラガス茎および根組織片における短鎖フルクトオリゴ糖の集積

DOI NDLデジタルコレクション 日本農学文献記事索引 Web Site Web Site 被引用文献1件 参考文献24件

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  • Accumulation of Short-chain Fructo-oligosaccharides in Excised Stem and Root Tissues of Asparagus Cultured on a Carbohydrate-rich Medium

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To understand the production of fructo- oligosaccharides in asparagus storage roots, the accumulation of exogenous carbohydrates and changes in the amount of short-chain fructo-oligosaccharides (degree of polymerization (DP) = 3 and 4) were examined in excised stem and root tissues of young asparagus plantlets that had been cultured on a carbohydrate-rich medium. Analyses of the carbohydrates and water content of cultured segments showed that exogenous carbohydrates from the medium gradually penetrated each tissue, regardless of the type of carbohydrate. Short-chain fructo-oligosaccharides accumulated in segments that had been cultured for more than 12 hr on a medium that contained glucose, fructose or sucrose but not mannitol or sorbitol. Furthermore, not only root tissue but also stem tissue synthesized short- chain fructo-oligosaccharides in vitro. No increase in starch occurred in any segments with or without a carbohydrate in the medium. Short-chain fructo-oligosaccharides in cultured tissues started to increase at a lower concentration of exogenous carbohydrate in root segments than in stem segments, accumulated to a greater level in the former than they did in the latter after 96 hr- of culture. The threshold level for fructo-oligosaccharide synthesis triggered by the accumulated fructose, glucose and sucrose may be lower in root tissue than in stem tissue, that accounts for the difference in fructo-oligosaccharide content between stems and storage roots of intact plantlets.

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  • 園芸学会雑誌

    園芸学会雑誌 73 (2), 119-127, 2004

    一般社団法人　園芸学会

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